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Method of anti-pollution treatment of a used refining catalyst and complete recuperation of the different metal constituents of this catalyst
Method of anti-pollution treatment of a used refining catalyst and complete recuperation of the different metal constituents of this catalyst
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机译:一种用过的精炼催化剂的抗污染处理方法,以及该催化剂不同金属成分的完全回收方法
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摘要
Process for antipollution treatment and recovery of the metals from a refining catalyst in the spent state, containing at least one contaminating metal chosen from the group consisting of vanadium, nickel and iron. The process of the invention is characterised especially in that: a) the catalyst discharged from the industrial unit is subjected to a stripping operation; b) the stripped catalyst is calcined under critical conditions; c) the calcined catalyst is subjected to a heat treatment in the presence of an alkaline base in the molten state; d) the solid mass resulting from stage c) is treated with water. The process applies to an antipollution treatment and the recovery of the metals from spent catalysts especially from catalysts for hydrotreatment or hydroconversion of an oil feedstock.
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